Apr 29, 2026 • Leetcode
Open the Lock
You have a lock in front of you with 4 circular wheels. Each wheel has 10 slots:
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Apr 28, 2026 • Leetcode
Design HashMap
Design a HashMap without using any built-in hash table libraries.
Read more →Apr 27, 2026 • Leetcode
Ransom Note
Given two strings ransomNote and magazine, return true if ransomNote can be constructed by using the letters from magazine and false otherwise.
Read more →Apr 26, 2026 • Leetcode
Matchsticks to Square
You are given an integer array matchsticks where matchsticks[i] is the length of the ith matchstick
Read more →Apr 25, 2026 • Leetcode
Additive Number
An additive number is a string whose digits can form an additive sequence.
Read more →Apr 24, 2026 • Leetcode
Interleaving String
Given strings s1, s2, and s3, find whether s3 is formed by an interleaving of s1 and s2.
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